I am working on a chat app. For which i need to save contacts. So i am saving all contacts from ABAddressBook in my core data entity. Problem is how can i know if a contact is modified or removed f...

iOS9 deprecates user info features for CloudKit and ABPerson. e.g. in the properties of CKDiscoveredUserInfo firstName" Deprecated in iOS 9.0 lastName" Deprecated in iOS 9.0 I want last n...

I want to get the user mail address, as shown in this thread : Getting user's default email address in Cocoa But when I tried : NSString *theEmailAddressWeWantToObtain = @""; ABPerson *aPers...